Finding out more about the UNIX operating system

The following books provide a detailed technical description of the UNIX operating system. They are not intended for the general user.

System V variants

Bach, M.J.
The Design of the UNIX Operating System
Prentice-Hall ISBN

Berkeley Standard Distribution

Karels, Michael J., Leffler Samuel J., McKusick, Marshall K., and Quarterman, John S.
The Design and Implementation of the 4.3BSD UNIX Operating System
Addison Wesley ISBN 0-201-06196-1